ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,705, issued on July 21.
"Hair colorant compositions" was invented by Nan Wang (Frankfurt, Germany), Ursula Christina Glaser (Wiesbaden, Germany), David Sarro (Frankfurt am Main, Germany) and Giuseppe Esposito (Frankfurt am Main, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to hair coloring and/or bleaching compositions that can be applied at less aggressive pH environment using relatively low oxidizing agent amounts, as well as their kits and methods thereof. The compositions exhibit low odor and substantially reduced hair fiber damage, are compatible with current dyes and dye precursor systems and result in e...